
A smart grid is a modernized electrical grid that uses analogue or digital information and communications technology to gather and act on information, such as information about the behaviours of suppliers and consumers, in an automated fashion to improve the efficiency, reliability, economics, and sustainability of the production and distribution ...
Found on
http://en.wikipedia.org/wiki/Smart_grid

An electric grid that is able to use two-way communication and computer processing to provide increased reliability and efficiency. Smart grids may be able to automate and control more functions than the current electric grid.
Found on
http://needtoknow.nas.edu/energy/glossary/
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